Like all sensors the CameraDriverRelay is located at a certain position, which is configured in a <RelPose> that contains a reference to a LocatedObject-ID or a frame-name.
See the example for such an node:
<CameraDriverRelay TopicName="/cop/right/camera" Rate="5" SensorName="RightCam" Bitsperchannel="-1" CalibFileName="./right_stereo_color_calib_next.dat" CamColor="0" CamPort="-1" CameraType="default" Colospace="default" Device="RightEyeCalc" Externaltrigger="default" Field="default" Gain="-1" GrabberName="GigEVision" HasPTU="0" Hresolution="1" Linein="-1" SetImageHeight="0" SetImageWidth="0" Startcolumn="0" Startrow="0" Vresolution="1"> <RelPose loid="/RightEyeCalc" /> </CameraDriverRelay>
see also <ImageInputSystem>